97 lines
3.6 KiB
Plaintext
97 lines
3.6 KiB
Plaintext
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSGTERRAIN_COORDINATESYSTEM
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#define OSGTERRAIN_COORDINATESYSTEM 1
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#include <osg/Object>
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#include <osg/Vec2>
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#include <osg/Vec3>
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#include <osgTerrain/Export>
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namespace osgTerrain
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{
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/** CoordinateSystem encapsulate the coordinate system that associated with objects in a scene.*/
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class CoordinateSystem : public osg::Object
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{
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public:
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CoordinateSystem();
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CoordinateSystem(const std::string& projectionRef);
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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CoordinateSystem(const CoordinateSystem&,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
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META_Object(osgTerrain,CoordinateSystem);
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inline bool operator == (const CoordinateSystem& cs) const
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{
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if (this == &cs) return true;
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if (_projectionRef == cs._projectionRef) return true;
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return false;
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}
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inline bool operator != (const CoordinateSystem& cs) const
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{
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return !(*this==cs);
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}
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/** Set the CoordinateSystem projection reference string, should be stored in OpenGIS Well Know Text form.*/
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void setProjectionRef(const std::string& projectionRef) { _projectionRef = projectionRef; }
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/** Get the CoordinateSystem projection reference string.*/
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const std::string& getProjectionRef() const { return _projectionRef; }
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/** CoordinateTransformation is a helper class for transforming between two different CoodinateSystems.
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* To use, simply constructor a CoordinateSystem::CoordinateTransformation convertor(sourceCS,destinateCS)
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* and then convert indiviual points via v_destination = convert(v_source), or the
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* CoordinateTransformation.convert(ptr,num) method when handling arrays of Vec2/Vec3's.*/
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class CoordinateTransformation : public osg::Referenced
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{
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public:
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static CoordinateTransformation* createCoordinateTransformation(const CoordinateSystem& source, const CoordinateSystem& destination);
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static void setCoordinateTransformationPrototpe(CoordinateTransformation* ct);
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virtual osg::Vec2 operator () (const osg::Vec2& source) const = 0;
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virtual osg::Vec3 operator () (const osg::Vec3& source) const = 0;
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virtual bool transform(unsigned int numPoints, osg::Vec2* vec2ptr) const = 0;
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virtual bool transform(unsigned int numPoints, osg::Vec3* vec3ptr) const = 0;
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protected:
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CoordinateTransformation() {}
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virtual ~CoordinateTransformation() {}
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virtual CoordinateTransformation* cloneCoordinateTransformation(const CoordinateSystem& source, const CoordinateSystem& destination) const = 0;
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};
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protected:
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virtual ~CoordinateSystem() {}
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std::string _projectionRef;
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};
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}
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#endif
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